JPH01131234U - - Google Patents

Info

Publication number
JPH01131234U
JPH01131234U JP1988027527U JP2752788U JPH01131234U JP H01131234 U JPH01131234 U JP H01131234U JP 1988027527 U JP1988027527 U JP 1988027527U JP 2752788 U JP2752788 U JP 2752788U JP H01131234 U JPH01131234 U JP H01131234U
Authority
JP
Japan
Prior art keywords
ground fault
power supply
bandpass filter
fault detection
integrator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1988027527U
Other languages
English (en)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1988027527U priority Critical patent/JPH01131234U/ja
Publication of JPH01131234U publication Critical patent/JPH01131234U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Generators And Motors (AREA)
  • Control Of Electric Motors In General (AREA)

Description

【図面の簡単な説明】
第1図はこの考案の一実施例を示す概略回路図
、第2図乃至第4図はこの考案の他の実施例を示
す概略回路図、第5図は従来のVVVF電源系統
の地絡検出の一例を示す概略回路図である。 1……交流電源、2……VVVF装置、3……
出力変圧器、4……接地変圧器、6……地絡検出
器、7……交流電動機、8……バンドパスフイル
タ、9……積分器。

Claims (1)

    【実用新案登録請求の範囲】
  1. 可変電圧・可変周波数装置を備えた交流電動機
    に系統電源から給電が与えられ、給電中に地絡が
    あつたとき地絡検出回路で地絡を検出するものに
    おいて、地絡検出回路に極高低調波をカツトする
    バンドパスフイルタを設けるとともに、バンドパ
    スフイルタからの出力を演算する積分器を備えた
    ことを特徴とする地絡検出装置。
JP1988027527U 1988-03-03 1988-03-03 Pending JPH01131234U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988027527U JPH01131234U (ja) 1988-03-03 1988-03-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988027527U JPH01131234U (ja) 1988-03-03 1988-03-03

Publications (1)

Publication Number Publication Date
JPH01131234U true JPH01131234U (ja) 1989-09-06

Family

ID=31250092

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988027527U Pending JPH01131234U (ja) 1988-03-03 1988-03-03

Country Status (1)

Country Link
JP (1) JPH01131234U (ja)

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